Pros
You gain real life experience and great problem solving skills first hand. I learned so much when things would all fall apart (which they did many times). It always felt like you were playing catch up because you can't solely focus on recruiting because you're checking temps in the bad side of town to make sure they're all there at late hours of the night. You also have to deal with firing people and laying people go. At key staff I was the front office, recruiting coordinator, babysitter of temps, recruiter, master of settling fires, and much more. Great if you're starting your career because it opened many opportunities after I left. Don't expect it to be a walk in the park because you have to do a lot of hard work here. If you aren't a problem solver (even if it's not your mess up) and apt to crying all the time DO NOT WORK HERE.
Cons
Having to constantly baby sit employees because they don't show, are late, have poor work ethic, or are upset you have to fire them or give a verbal warning. Very stressful as you are salary and sometimes can't leave the office until late work hours when the sun is down. My last con would be temps calling your cell phone leaving drunk messages. That was the cherry on top, but there was always something going on. Cons are you are constantly trying to replace the people you're firing or are quitting.